Lens Diaries Go Now
Glamour, Beauty, Nude, Models, Photographers

*    |  Register  


 
Go Back   Garage Glamour™ > Garage Glamour™ Main Forums > Tech Talk Forum
 

Tech Talk Forum Photography & Technical Related Only!

Reply
 
LinkBack Thread Tools Display Modes
Hensel porty premium question
Old 12-19-2005, 01:42 PM   #1 (permalink)
Free Member
 
Join Date: Feb 2004
Member GG#: 38112
Location: Pleasant Grove
Posts: 130
Comments: 0

telcoman is offline IP: 216.43.0.134
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote


I've been looking at the porty premium and have some questions that hopefully someone can help me with.

1) The porty premium has asymetrical distribution whereas the normal portys don't. Is this a huge deal or can it be achieved by moving one light closer or further away to get the lighting ratios you're after.

2) The asymetrical distribution, is that simply power output but for correct ratios but you've still got to get the lights equal distances from the subject.

3) Does the premium kit come with an AC power supply or does it run off the batteries only?

I've only used monolights so I'm somewhat confused by how power distribution and metering is handled with power packs. If someone would be kind enough to enlighten me I would be most appreciative. (releates to questions 1 and 2)

Thanks in advance.

David
  View Public Profile Send a private message to telcoman Visit telcoman's homepage! Find More Posts by telcoman
 
a non-Hensel answer
Old 12-20-2005, 02:19 AM   #2 (permalink)
Lifetime Photographer
 
Join Date: Jun 2003
Member GG#: 35977
Posts: 609
Comments: 0

Andy_Pearlman is offline IP: 72.25.123.86
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

I'm not familiar with the Hensel, but I might be able to explain power distribution on this style of strobe. I have several Norman power packs and have used most of the pro systems (Dynalite, Speedotron, Profoto, etc) at one time or another. Basically, they all work the same. They usually have "channels" which may or may not have equal power. The channels work independently, unless you do something that ties them together. For example, the "A" channel might have 1200ws (watt seconds) available, while the "B" channel has only 800ws. Each channel has a seperate switch that further enables you to cut the power in half AND/OR a variator (like a dimmer) that lets you control the output seamlessly. (I have 3 Norman packs with that combo). If you plug one head into the 1200ws side, you get up to 1200ws through that head (if you have the power selector switch set to 1200ws). If you plug another head into the same channel (most channels have 2 or 4 outlets), you split the power between the two heads evenly. If you put one head on each channel, you get 1200ws from one, and 800ws from the other. If you cut the power level switches down on both channels, that changes to 600ws and 400ws respectively. Every combination of multiple heads into one channel, divides the power output evenly amoung however many heads are in that channel (sometimes we use an extra head aimed off to the side as a "dump" head, just to lower the output levels on whatever else is plugged into that channel. (This is all about controling the "power" ratios and output). Now most of these kinds of packs have another switch that joins the two channels for maximum (and symetrical) power output to all the outlets together like they were one big channgel. In other words, by throwing the switch on my pack I can get a total of 2000ws out of one head, or 1000ws from each of two heads, 500ws from each of 4 heads, 660ws out of each of 3 heads, etc. (And not to make this too much more confusing, on some packs, including my Normans, the "join" switch is not a switch, but one of the outlets, that when occupied by a head cable, accomplishes the task of joining the two channels of the pack. This is all really easy when you've been working with this type of pack for a while, but is total different from the monolight method.

Now one more thing. Even though you have the power distribution under control, that does not necessarily mean the heads will put out exactly the same level of light. All you're doing here is controling the power levels, not the light output. All things being equal, you would have the same amount of light at the same distance, but that would mean you'd have matching light modifiers (reflectors, umbrellas, grids, diffusion, snoots, etc) as well as flashtubes of exactly the same age, and exactly the same length on the cables, etc. In practice, we set them up to be how we think we want them by eye, then use a flashmeter to determine if the power should be higher or lower, change the modifier, move the position of the head, etc.

Here's a couple shots illustrating a studio lighting setup, in the one on the left you can see one of the Norman packs (gray on top, black on bottom) and see the heads in use with reflectors and soft boxes. The nice thing about this type of light is amoung other things, they're not so top heavy, they're cheaper to repair, if one goes out on you, you can easily replace it in the setup, and they're more flexible to work with in the way they fit into odd places, and you can get a lot more power of of them than a monolight. The downside of course is you have to carry a pack AND a head (but extra heads are cheaper than additional monolights = more flexibilty).





Regards,
Andy Pearlman
Andy Pearlman Studio
  View Public Profile Send a private message to Andy_Pearlman Visit Andy_Pearlman's homepage! Find More Posts by Andy_Pearlman
 
Re: a non-Hensel answer
Old 12-20-2005, 06:14 AM   #3 (permalink)
Free Member
 
Join Date: Nov 2005
Member GG#: 48382
Location: Cairns
Posts: 153
Comments: 0

MikeInOz is offline IP: 203.171.94.141
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

Interesting post. I particularly like how you labelled the client and dog. [img]/ubbthreads/images/graemlins/smile.gif[/img]

-Mike
  View Public Profile Send a private message to MikeInOz Find More Posts by MikeInOz
 
Re: a non-Hensel answer
Old 12-20-2005, 10:15 AM   #4 (permalink)
Free Member
 
Join Date: Feb 2004
Member GG#: 38112
Location: Pleasant Grove
Posts: 130
Comments: 0

telcoman is offline IP: 216.43.0.134
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

Andy,

Thank you. That answered my questions about how power packs worked. I suspected that was the basic theory but wanted confirmation. So when Hensel says it's got ratios of 1:1 1:2 and 1:3 they're talking about power output ratios. I've still got to be responsible for getting the metering right through modifiers/distance.

Feel free to post more behind the scenes pictures any time you want.

Thanks again,

David
  View Public Profile Send a private message to telcoman Visit telcoman's homepage! Find More Posts by telcoman
 
Re: Hensel porty premium question
Old 12-20-2005, 03:14 PM   #5 (permalink)
Free Member
 
Join Date: Nov 2005
Member GG#: 48325
Location: Wills Point, TX.
Posts: 1,188
Comments: 0

lobofw is offline IP: 66.82.9.62
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

Now this is what I like to see. Actual setups for shoots. But, I also envy those who have a lot of room . [img]/ubbthreads/images/graemlins/confused.gif[/img] [img]/ubbthreads/images/graemlins/frown.gif[/img]
  View Public Profile Send a private message to lobofw Visit lobofw's homepage! Find More Posts by lobofw
 
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hensel 500 pro question SFJ Photography Tech Talk Forum 2 09-30-2007 10:47 PM
Hensel porty premium plus vs elinchrom ranger rx as LacrymosaPhoto Tech Talk Forum 10 04-24-2007 12:04 PM
Using Hensel Porty? eldor Tech Talk Forum 0 04-18-2006 04:02 PM
Hensel Porty and Mola Beauty Dish kentalan Tech Talk Forum 8 07-31-2005 10:36 AM

Sponsors


New To Site? Need Help? Photographer & Model Links
All times are GMT -5. The time now is 10:09 AM.

© 1999-2017 Garage Glamour™




Search Engine Friendly URLs by vBSEO 3.2.0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93